Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: PHLAPAMK17Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
215-391 A Philadelphia Zone 1 PA 784E BLOCK LINE SYSTEMS, LLC - PA 228      
215-890 A Philadelphia Zone 1 PA 784E BLOCK LINE SYSTEMS, LLC - PA 228      
302-232 A Bridgeville DE 783E BLOCK LINE SYSTEMS, LLC - DE 228      
484-378 A Coatesville PA 784E BLOCK LINE SYSTEMS, LLC - PA 228      
610-474 A Royersford PA 784E BLOCK LINE SYSTEMS, LLC - PA 228      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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